The government has introduced several important changes in GST in the recent past. One is that it will restrict the benefit of taxes paid but not available in GSTR-2A to 20% of amount of tax available in GSTR-2A.This will seriously impact the buyers particularly where some of the suppliers file Quarterly Returns. A proper understanding of this new rule is necessary. The final deadline of GSTR-9 & 9C for 17-18 is 31.12.2019 & for 18-19 is 31.3.2020. The government has simplified them by making some fields optional for 17-18 & 18-19 and also issued various instructions from time to time. The same will be discussed threadbare so that GSTR-9 & 9C can be filed without much problem. Also, why GSTR-9 should be filed even where optional, shall be discussed.